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-rw-r--r--src/stub-cache.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stub-cache.cc b/src/stub-cache.cc
index 6b41577e..e6df1b49 100644
--- a/src/stub-cache.cc
+++ b/src/stub-cache.cc
@@ -988,6 +988,7 @@ Object* StoreInterceptorProperty(Arguments args) {
Object* KeyedLoadPropertyWithInterceptor(Arguments args) {
JSObject* receiver = JSObject::cast(args[0]);
+ ASSERT(Smi::cast(args[1])->value() >= 0);
uint32_t index = Smi::cast(args[1])->value();
return receiver->GetElementWithInterceptor(receiver, index);
}